A bar magnet, of magnetic moment M, is placed in a magnetic field of induction B. The torque exerted on it is

\to M . \to B

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\to B \times \to M

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\to M \times \to B

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- \to B . \to M

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Solution

The correct option is C $\to M \times \to B$
The torque is defined as the cross product of magnetic moment and the magnetic field.
$\to M \times \to B$

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A bar magnet of moment $\to M =^i +^j$ is placed in a magnetic field induction $\to B = 3^i + 4^j + 4^k$ .

The torque acting on the magnet is

10^i A - m^{2}

¯ ¯¯ ¯ B = (2^i + 3^j) T

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